Obviously, there's a risk of your biometric information being stolen or spoofed. However, if combined with a government-issued ID, this could make it nearly impossible for AI to acquire and resell your intellectual property.
I should add that something like this sortof existed for businesses. They could buy Extended Validation certificates. Initially this required a public notary but that did not scale well at all. Eventually all the friction was removed and the only difference was you needed a Dun & Bradstreet number and to pay more for the cert. It sounds like you want something similar but on the client side which would be even harder to scale in my opinion.